Pivoted brake shoe



A r1,634,370l 5h33' a 192,47 A. Y. DODGE iIvTED BRAKE SHOE.

Filed May 22 1926 .f ATTORNEY wenn ferries.

ADIEL 'il'. DG-l OE' SUTH BEND, NDIANA, SS'GNUR '.l@ BENDIX. BRAKE COMPANY,

' CEICGO, ILLNOIS, A. CORPELLTEN FLLINGIS.

Application ie l-lay 22,

yl`his invention relates to brakes and is illustrated as embodied in an internal '.epending brake for an automobile. An obgect of the invention is to construct the shoes so s that they hay be inounted in the brake in such a manner as toy have a rocking movenient to perniit theni to adjust their positions to the surface oi the brake druin. This has the double adifantage otl melting it unw necessary to loria soine oi the parts With cxtreme accuracy and on the other hand it allows the brake shoes to compensate 'for dis-l tortions ot the drinn or shoes which take place in service.

ln one desirable embodiment the shoe is formed with a novel spherical soclret containing,- a spherical ball mounted pivotally to support the shoe for movement about an axis extending crosswise of the shoe While still permitting rocking of the shoe about other axes. lrei'erably the ball is formed with a diametrical opening to receive the brake shoe pivot. ln the arrangement illustrated in the drawing, and which shows s very .strong and rigid shoe which can lbe constructed at a low price, the shoe has a stitlcning web preferably formed of two flanges, and 'which may torni parts of two novel stanipings making up the brake shoe, the nietal of the flanges being drawn in opposite directions to forni halt-sockets of sen'ii-spherical :torni which face toward one another and 7which embrace the above-described spherical ball.

Other ifeatures ot the invention relate to the mounting o the pivot member so that it is carried by spaced franges forming part ot one brake shoe and passes through the abovewlescribed spherical bal/l carried by a different. shoe straddled by the spaced flanges, and to a novel interlocking arrangement of the pivot with a stop7 and to a conibination oi a novel steadyiest with the above-described pivotal mounting for the shoe, and to other novel combinations o parts and desirable particular constructions, which will be apparent trein the' ollowing description ot one illustrative embodiment shown in the accompanying drawing, in which:

Figure l is a Vertical section through the brake instinside the head ot the brake drum and showing t'ie shoes in side elevation;

Figure is a. partial. section on the line rieure l.

u showing the novel pivotal 1926. Serial lo, Y lwlitl.

connection between two of the shoes and shoiying the interlocking with the stop;

Figure 3 is a partiel sect-ion on the line 3-3 of Figure l showing the anchorage of one shoe; and

Figure 4 is a partial section on the line lf-el. of Figure l and showing one ot the novel steady-rests in detail.

'lhe particular brake selected for illustration includes a rotatable drum l0, at the open side ot which there may be arranged a suit able support. such as a backing plate l2, and Within which are arranged' three shoes '14, 16, and i8, the shoes 14; land 18 preferably being identical and interchangeable. The shoe ,16 is ancliored'on backing plate 12 or other equivalent support by being mounted on a pivot member 209 While the shoes 14 and 18 are connected to the shoe 16 by pivots 22 and 24, which may be of the same general construction. The brake may be applied by suitable means 'such as a double cam 26, forcing the shoes tft-and i8 in opposite directions against the resistance or" a return spring 28, the shoe 16 being applied by nioveinent ot the shoeslt and 18 (principally the' shoe 18) against the resistance of an auxiliary return spring 30.

rElie shoe 1G is shown as built up of two sheet inetal stanipings 32 and 34:, generally ta-shaped in cross-section but preferably provided with a narrow reinforcing flange 36 along the inner edges, and which are riveted or Welded or otherwise secured back to bach to torni a shoe T-shaped in cross-sec tion. Each of the shoes lll and 18 is built up tl'iroughout the major part of its length by lfsectioa stainpings welded or riveted or otherwise secured back to back as appears in Figure t, the flanges of the' stampings being spread apart at the end of the shoe as appears in Figures 2 and 3 to form spaced parallel arms stracldling the adjacent end of shoe lo and formed for pivotal engagement with the pivots 22 and 2% as shown in Figure 2.

According to an important feature of the present invention, 'the radial llanges of the stainpings 32 and 84 which form the stillening web ot shoe i6 are drawn in opposite directions at the ends o 'the shoe, to form` partially semispherieal sockets 86 and 38 em- 1 e bracing a spherical ball e0 lorming a bearing; :tor the shoe permitting it to roch cross- Wise. mi

ine ball. Il@ orining the bearing at the left end of shoe 16 in Figure 1 is formed with a dialnetrieal opening to receive the pivot as shown in Figure 2, livot 2:2 is formed with a flange 42 at its end interlocking with a novel grooved eccentric stop 44 against which it is urged when the brake is released by auxiliary spring 30. lhe spherical ball 40 at the right end of the shoe is also formed with a dianietrical opening to receive the anchor 2O which is `lixedly mounted in any suitable manner on the backing late 12, and which passesthrough relatively arge openings 4o in the arms forming the end ofthe shoe let. Ball 40 vfor the anchor 20 is confined between a shoulder 48 on the anchor 2O and a nut 5() threaded on the end or" the anchor. The pivotal connection 24 between shoes 14 and 16 may bc, and preter- 4ably is, the saine as the connection 22 shown in Figure 2 except that it is not necessary to provide a stop 44.

ln order to limit the rocking ot' the shoes. l prefer to provide each of them with a novel steady-rest, one of which is shown in detail in Figure t and which includes a shouldered pin .52 carried by the backing plate or other support projecting through a slot 5ft in the stitening lange of the shoe. A washer 5G seated against the shoulder of pin engages one side of the stiflening flange ol' the-shoe, while a washer 58 is yieldingly held against the opposite side of the stitening flange hy a spring 60 coniincd by a washer 52 held by a Cotter pin or the like 61. This arrangement positively limits the rocking of the shoe in one direction and yieldingly limits the rocking in the opposite direction.

While one -illustrative embodiment has heen described in detail, it is not my inlention to limit its scope to that particular enibodirnent or otherwise than by the terms of the appended claims.

il claim:

1. A brake shoe having in one end a partial spherical socket, and a spherical hall mounted in said socket and formed with an opening crosswise of the shoe lo receive a pivot for the shoe, the lshoe being movable on the hall in any direction about the center oft' the hall.

2. A' brake shoe having in one end a partial spherical socket, and a spherical ball inounted in said socket and forincdwitl: a cylindrical diainetrical opening cro l 'isc of the shoe lo rta'civc/-a pivot for the shoe. the shoe being movable on the ball in any direc tion about the center ot' the ball.

A brake shoe formed of two parts se cured together, cach l'orined at the end ol' thc shoe with part of a partial spherical sockel, and a spherical hall mounted in said sockets and formed and arranged pivotally to support the shoe l'or movement about an axis extending crosswise ofthe shoe.

4. A brake shoe formed of lwo 'halves secured together in the rentral plane of the shoe7 each formed at the end 0l the shoe with one half ol a partial spherical socl-ret, and a spherical ball mounted in said socket and formed and arranged pivotally to support the Ishoe l'or movement about an axis extending crosswise of the shoe.

5. A brake shoe having at one end a partial spherical socket, and a spherical ball mounted in said socket and forniedand arranged pivotally to support theshoc for movement about an axis extending crosswise ot' the shoe, the socket. extending entirely around the ball to retain the ball permanently in the socket.

A brake shoe having at one end two flanges jointly forming a partial spherical socket, and a spherical ball mounted in said socket and formed and arranged pivotally to support the shoe Yfor movement about an axis extending crosswise of the shoe, the socket extending entirely around the ball to retain the ball permanently in the socket.

7. A brake shoe having a central stillening web including'two flanges drawn out in opposite directions to form semi-spherical halt-sockets facing each other, and a spherical ball seated between said half-sockets and formed and arranged pivotally to support the shoe.

8. A' brake shoe having a central still'cning web having parts projecting in opposite dirrctions to form senil-spherical lialf-sockcls facing each other, and a spherical ball seated between said halt-sockets and formed and arranged pivotally to support the shoe.

t). A brake shoe with a cylindrical friction part having at least at one point a web formed ot two flanges integral with portions` ol the friction part and with the metal of the flanges displaced away from each other to f'orin semi-spherical half-stx'kcts facing cach other.

loo

lt). A brake shoe having at least at one point a web formed ol two flanges and with the metal of.' the flanges displaced away from cach other to form semi-spherical half-sock` cts lfacing each other.

ll. A brake shoe formed of two pressed nictal parts secured together lengthwise of the shoe and each including a stiffening flange extending lengthwise of the shoe, and

with the metal of the flanges displaced away scini-sperical sockopposite 55 Larme@ with an CU nu, FL

fi ding ly na web away from mwa-:ment 59 e mm im@ 

